I bought a refurbished iPhone 6 from Handtec in November 2016. It arrived promptly and was, in my view and for the price paid, in superb condition. It's still working perfectly well a year later and remains, effectively, as new. I've just pre-ordered a refurbished Apple Watch and spent a good amount of time talking to them yesterday, both by phone and using their "chat" facility. Again, my experience was excellent.